The CLR has been unable to transition from COM context 0x2210c40 to COM context 0x2210e90 for60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.

can you providen some more details about the code. we have no clue about the data type of the variable DB and has any C++ wrapper gets called in the execution flow? on executing which line you are getting this exception? what are you trying to achieve ?